📏 Pounds to Kilograms Converter
Convert pounds (lb) to kilograms (kg) instantly, with the formula, a worked example and a conversion table.
Quick answer: 1 pound (lb) = 0.45359237 kilograms (kg). Formula: kg = lb × 0.45359237.
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Pounds to Kilograms Converter inputs
Result
Pounds to Kilograms conversion table
| Pounds (lb) | Kilograms (kg) |
|---|---|
| 0.1 lb | 0.045359237 kg |
| 0.5 lb | 0.22679619 kg |
| 1 lb | 0.45359237 kg |
| 2 lb | 0.90718474 kg |
| 3 lb | 1.3607771 kg |
| 5 lb | 2.2679619 kg |
| 10 lb | 4.5359237 kg |
| 20 lb | 9.0718474 kg |
| 25 lb | 11.339809 kg |
| 50 lb | 22.679619 kg |
| 100 lb | 45.359237 kg |
| 1,000 lb | 453.59237 kg |
Other weight conversions
How to convert pounds to kilograms
Multiply the number of pounds by 0.45359237 to get kilograms: kg = lb × 0.45359237.
Example: 5 lb = 2.2679619 kg.
The pound (lb) and the kilogram (kg) are both units of weight. Need the opposite direction? Use the kg to lb converter.
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Metric and imperial units
The metric system (SI) is used by almost every country and by science worldwide. Its units scale by powers of ten – 1 kilometer is 1,000 meters, 1 meter is 100 centimeters – which makes conversions inside the system easy. The imperial and US customary systems (inches, feet, pounds, gallons) are still used daily in the United States and partly in the UK.
Since 1959 the inch has been defined as exactly 2.54 centimeters and the pound as exactly 0.45359237 kilograms, so conversions between the two systems are exact. Note that a US gallon (3.785 L) and an imperial gallon (4.546 L) are different – choose the right one above.
This converter covers 10 categories and 66 units: length, weight, temperature, volume, area, speed, time, data, energy, pressure.
Frequently asked questions
How many kilograms are in a pound?
1 pound = 0.45359237 kilograms.
How do I convert pounds to kilograms?
Use the formula kg = lb × 0.45359237. For example, 5 lb = 2.2679619 kg.
How do I convert kilograms back to pounds?
1 kilogram = 2.2046226 pounds. Use the kg to lb converter linked on this page.
Are these conversions exact?
Yes – all factors use the internationally defined values (for example 1 inch = 2.54 cm exactly, 1 pound = 0.45359237 kg exactly). Results are rounded to 8 significant digits for display.